Novel dendrimer-like N-doped TiO 2 -Fe 2 O 3 /C derived from bimetallic Ti-Fe-MOFs for the photocatalytic degradation

Abstract In this study, N-doped TiO2-Fe2O3/C nanostructure is prepared by mixing of the precursors of both metals (Ti and Fe) with the N doped ligand precursor in the same process and further being calcined at 500oC directly in air atmosphere. Herein, other three different Ti-MOFs precursors and its derivatives were also obtained in the same way for comparison of structure and performance. Interestingly, the obtained products derived from N doped bimetallic Ti-Fe MOFs display a particularly dendritic structure with large surface area and well mesoporous structures. Meanwhile, it was further confirmed from FTIR and XPS results that the derivatives were still retain N and C components after calcination in air condition which is beneficial to improve the photocatalytic activity. Finally, the prepared N doped dendritic bimetallic structure as a photocatalyst to decompose methylene blue (MB) dye. It was showed that N-doped TiO2-Fe2O3/C demonstrates better photocatalytic performance than that of N-doped TiO2/C and non-N-doped TiO2/C and the MB degradation efficiency of N-doped TiO2-Fe2O3/C reaches 81%.